Hill's® Prescription Diet® k/d® is a complete and balanced food that provides all the nutrition your dog needs. It protects vital kidney & heart function and boosts vitality & energy. It also supports your dog's natural ability to build lean muscle daily. Hill's nutritionists and veterinarians developed Prescription Diet® k/d®, clinical nutrition to support your dog's kidney health. The nutrition of Prescription Diet® k/d® is clinically proven to improve & lengthen quality of life. This product requires a veterinary prescription.